A ALGORITHM OF DYNAMICALLY ASSIGNING UPSTREAM BANDWIDTH OF HYBRID FIBER-COAX NETWORKS

The contradiction between the shortness upstream bandwidth of hybrid f iber-coax (HFC) networks and a large number of services to be transmit ted, is very sharp. Specially, a part of bandwidth assigned to real-ti me variable bid rate (rt-VBR) services, is redundancy. Thus, the algor ithm of assigning upstream bandwidth must have high bandwidth multiple xing. The algorithm described here bases on ATM's traffic descriptor p arameters and the quality of service (QoS) parameters, and is designed for rt-VBR services. The algorithm utilizes the bursts and cell loss rate of rt-VBR services to multiplex bandwidth. The algorithm has also the function of call admission control.